The official blockchain quatrain

The moving finger writes; and having writ

Moves on; nor all your piety nor wit

shall lure it back to cancel half a line,

Nor all your tears wash out a word of it.

#Blockchain

OK, I added the hashtag, but the rest is from Edward Marlborough’s 1859 translation of the Rubáiyát of mathematician, astronomer, philosopher and poet Omar Ahayyám (1048-1131).